libsigrok now supports the PCE PCE-322A sound level meter.
This is a USB-based sound level meter with various settings such frequency weighting (A or C), a frequency range of 31.5 Hz to 8 kHz, an internal memory store, an built-in RTC, and others.
The device protocol is documented in the sigrok wiki, as usual.
The driver was contributed by George Hopkins, thanks a lot!